Telegraphy.



I -1. KITSEE.

TELEGRAPHY.

APPLICATION FILED FEB. 3, 1906.

wmwsssas: INVENTOR.

PATENTED FEB. 11, 1908.

UNITED STATES PATENT onnron ISIDOR KITSEE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO WILLIAM J'. LATTA, OF PHILADELPHIA, PENNSYLVANIA.

TELEGBAPHY.

Specification of Letters Patent.

Patented Feb. 11, 1.908.

Application filed February 3,1906. Serirll No. 299.330.

T 0 all whom it may concern:

Be it known that I, Ismon Krrsnn, citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Telegraphy, of which the following is a s ieciiication.

My invention relates to an im rovernent in telegraphy and has more speciareference to t elegraphing over lines with comparative large capacity. It is well known that lines with capacity, such for instance as lines inclosed in cables, cannot well be operated with electric currents of one polarity and that a method whereby true reversals are sent over such lines is preferred in all cases. But on land lines where intermediate stations have to be provided, the adaptation of the true reversal system requires special arrangement for the intermediate stations and the object of my invention is, to provide such lines, having intermediate stations, with a simple and efiicicnt arrangement, whereby true reversals can be sent from any station required.

The drawing represents in diagrammatic view, a line with intermediate stations, the

, same provided with my invention.

A is the line proper grounded on both sides; I the condenser inserted at one terminal; J the condenser inserted in the other terminal of the line; K a source of current, here shown as one cell connected to the line of transmis sion at one terminal; S, S, are two interme-- diate stations,each statione nipped with the transmitting key A, the --po arized relay H and the source of current G. The key A embraces the lever B, the stationary point C, the switch E and the two'contacting points I), F, respectively.

It is noted that the source of current K is connected to the line in opposition to the source of current G and that the source of" current G consists of a greater number of cells than'the source K. In the drawing, the source K consists of oridclliiiid each of the sources G of two cells; Normally, that is, when the line is idle, the same is connected at each station directly to the switch E, but whenn'n operator desires to transmit a mes sage, "he moves his switch from the point D and connects the switch with the point F, thereby breaking the direct connection of the line and making a connection including the source G. In the line are then inserted in tive force than the source K. The manipulation of the key for the purpose of transmitting a message is the same as is practiced today on land lines, in the transmitting of messhallconnect with the point 0; this operation will shunt thebattery .or other source G.

As long as the lever is depressed and the source G short circuited, a momentary im pulse will flow from the source K in the direction of the unfeathered arrow, charging the condensers and thereby operating the polarized relay, so that the armature shall come to rest at one point, but when the depression ceases, that is, when the lever is moved away from the contact C, then the shunt around the source G is broken and as the potential of G is higher than the pOtentialofK, and as G is in opposition as to K, a momentary impulse will flow from G over the line in the direction of the feathered arrow. This impulse will be oi'a potential equal to the otential of G minus the potential of K.

his impulse will charge the condensers in opposite direction and will thereby operate the relay H, so that their armatures shall move in the direction opposite from the first direction and connect with the other point. Through the movement of this armature, a local circuit is operated and the longer or shorter depression of the key results in a longer or shorter record, audible or otherwise, oi' the translating devices inserted'in said local circuit.

Having now described myinvention, what I claim as new and desire to secure by'Letters Patent is:

1. In telegraphy, a line of transmission, a. source of current for said line, intermediate stations for said line, each station equipped with a source of current, a transmitting key, a polarized receiving instrument and'means to connect the line either directly or with' the interposition, of said source tosaid key, the two sources in opposition'as to each other.

2. In telegraphy, a line of trans mssioma difierent strength from the first source, a transmitting key and means to connect said tine either, directly or with the interposition -of said second source.

5 3. In telegraphing with true rerersals, a line of transmission provided with a series of stations, a main battery for one terminal of said line, intermediate batteries for each station, the intermediate batteries of an 10 electr0motive force greater than the main battery, receiving and transmitting device for each station, the transmitting device provided with means to connect the line either directly or with the interposition of said intermediate battery.

In testimony whereof aflix my sign aturc in presence of two Witnesses.

ISIDOR KITSEE. 

